Question

(a) Calculate the rotational kinetic energy (in J) of Mercury on
its axis. (Assume its mass to be 3.59 **✕**
10^{23} kg, the period about its axis to be 1420 h, and its
diameter to be 4880 km.)

_____ J

(b) What is the rotational kinetic energy (in J) of Mercury in
its orbit around the Sun? (Assume its distance from the sun to be
5.79 **✕** 10^{7} km and its period about the
sun to be 88.0 days.)

____ J

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